/Engine/Source/Runtime/MovieScene/Public/Evaluation/MovieSceneEvaluationTree.h
Allocate a new entry of the specified capacity. Will default-construct Capacity elements in the item array.
The identifier to be used to access the entry
[FEvaluationTreeEntryHandle](API\Runtime\MovieScene\Evaluation\FEvaluationTreeEntryHandle) AllocateEntry ( int32 InitialCapacity )